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The Gas Mark is a system and unit of marking temperatures on gas ovens and cookers in the United Kingdom and Commonwealth of Nations countries. It is still in use; however, it is not as widespread as it was in the last half of the twentieth century.
Additional recommended knowledge
The draft 2003 edition of the Oxford English Dictionary lists the earliest known usage of the concept as being in L. Chatterton's book Modern Cookery published in 1943: "Afternoon tea scones… Time: 20 minutes. Temperature: Gas, Regulo Mark 7". This particular example also illustrates the term in combination with the word "regulo". This usage pattern is now almost obsolete, but still used by some of the older members of society.
The term "gas mark" was a subject of the joint BBC / OED TV series Balderdash & Piffle, in May 2005, which sought to establish the history of the term.
The earliest printed evidence of use of "gas mark" (with no other terms between the two words) appears to date from 1958.
Different manufacturers and oven types do vary, so always refer to your cooker instruction book.
In general, the conversions between a Gas Mark temperature TG and a Fahrenheit temperature TF are given by
where the Fahrenheit constant kf takes the value kf = 275.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Gas_Mark". A list of authors is available in Wikipedia.|